Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
THE FORAGER’S AND ANGLER’S AMPHIBIOUS VEHICLE
A FLOATING CAR with a moped engine was built by A. Natarov from Yaroslavl. I would like to introduce MK readers to the amphibious vehicle I assembled. I designed it to solve a number of...
ON THE WATERS — THE RHYTHM OF THE WALTZ
Catamaran-vetrohod with hybrid propulsion. Despite the almost complete power supply equipment heat engines, shipbuilders are still hoping to create a workable ship, driven by wind. Only...
